CN203522203U - Trigger pulse string driving circuit - Google Patents
Trigger pulse string driving circuit Download PDFInfo
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- CN203522203U CN203522203U CN201320651147.8U CN201320651147U CN203522203U CN 203522203 U CN203522203 U CN 203522203U CN 201320651147 U CN201320651147 U CN 201320651147U CN 203522203 U CN203522203 U CN 203522203U
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- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 description 5
- 230000005622 photoelectricity Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 230000000737 periodic effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a trigger pulse string driving circuit and is applied to a thyristor dynamic switching reactive compensation capacitor device. The trigger pulse string driving circuit comprises an input switching signal detection circuit, a zero-crossing signal detection circuit, a logic determining circuit, a pulse string generation circuit, a pulse power amplification circuit and a pulse string isolation circuit, the input switching signal detection circuit outputs a switching signal to the logic determining circuit, the zero-crossing signal detection circuit outputs a zero-crossing output signal to the logic determining circuit, the logic determining circuit receives the two signals and then outputs a pulse string generation circuit trigger signal to the pulse string generation circuit, the pulse string generation circuit outputs a high-frequency pulse string signal to the pulse power amplification circuit, the pulse power amplification circuit realizes power amplification of the high-frequency pulse string signal and outputs the large-power high-frequency pulse string signal to the pulse string isolation circuit, and the pulse string isolation circuit outputs a thyristor reliable trigger pulse string signal to drive a thyristor module.
Description
Technical field
The utility model belongs to quality of power supply reactive power compensation field, specifically a kind of trigger impulse string drive circuit being applied on the dynamic switching reactive-load compensation capacitor of thyristor device.
Background technology
The dynamic response time that the switching producing when reducing reactive compensation switching capacitor shoves and promotes reactive power compensation, the dynamic switching reactive-load compensation capacitor of thyristor device is widely used in current reactive power compensation field.The thyristor driving circuit majority that the dynamic switching reactive-load compensation capacitor of thyristor device is used at present is all used integrated zero passage opto-coupler chip to trigger.This control circuit is simple, but has a lot of drawbacks.First,, often there is this chip by over-voltage breakdown phenomenon in zero passage opto-coupler chip withstand voltage lower, once this chip punctures, will be easy to cause thyristor damage in practical application, make the dynamic switching reactive-load compensation capacitor of thyristor device lose switching characteristic.Secondly, because receiving after switching signal, this chip triggers thyristor conducting in a zero crossing place burst pulse of output, this single burst pulse triggering mode is also unreliable, when having, disturb or other reasons causes this burst pulse cycle to reduce or amplitude reduces, can not trigger thyristor conducting, finally also likely damage thyristor.
Utility model content
The purpose of this utility model is to provide a kind of trigger impulse string drive circuit on the dynamic switching reactive-load compensation capacitor of thyristor device that is applied in that can avoid over-voltage breakdown and pulse to trigger unreliable problem.
The utility model is to realize like this, a kind of trigger impulse string drive circuit, it is applied on the dynamic switching reactive-load compensation capacitor of thyristor device, and this trigger impulse string drive circuit comprises input switching signal deteching circuit, zero passage signal detection circuit, logic judging circuit, pulse train circuit for generating, pulse power amplifier circuit, pulse train buffer circuit, this input switching signal deteching circuit output switching signal is to this logic judging circuit, this zero passage signal detection circuit output zero passage outputs signal to this logic judging circuit, and this logic judging circuit receive these two signals after output pulse string circuit for generating triggering signal to this pulse train circuit for generating, this pulse train circuit for generating is exported high-frequency impulse string signal thus to this pulse power amplifier circuit, this pulse power amplifier circuit carries out this high-frequency impulse string signal power amplification and exports high-power high-frequency burst signal to this pulse train buffer circuit, the reliable trigger impulse string signal of this pulse train buffer circuit output thyristor is to drive thyristor module.
As the further improvement of such scheme, this pulse train circuit for generating utilizes the monostable working method of NE555 chip, triggers the continuous high-frequency pulse string of its output certain frequency and duty ratio by this logic judging circuit.
As the further improvement of such scheme, this pulse train buffer circuit is converted into the high-power high-frequency burst signal of this pulse power amplifier circuit by pulse transformer the forceful electric power signal that drives thyristor.
The trigger impulse string drive circuit being applied on the dynamic switching reactive-load compensation capacitor of thyristor device of the present utility model has following characteristics:
1, input switching signal deteching circuit and post-stage drive circuit adopt photoelectricity isolation, make post-stage drive circuit noiseless to idle compensating control;
2, zero passage signal detection circuit adopts advanced photoelectricity zero passage technology, and fast and reliable, bears withstand voltage height, stable output signal;
3, the validity of logic judging circuit judgement input switching signal and zero cross signal, make the two interlocking, with, only have the two is true time simultaneously, just triggers rear class pulse train circuit for generating;
4, pulse train circuit for generating utilizes the monostable working method of NE555 chip, triggers the successive pulse groups of its output certain frequency and duty ratio by logic judging circuit;
5, pulse power amplifier circuit carries out power amplification by pulse train (i.e. this high-frequency impulse string signal), to strengthen the driving force to thyristor;
6, pulse train buffer circuit is converted into by the pulse train weak electric signal of front stage drive circuit (i.e. the high-power high-frequency burst signal of this pulse power amplifier circuit) the forceful electric power signal that rear class drives thyristor by pulse transformer, realizes strong and weak electricity isolation;
7, the smooth triggering and conducting of pulse-triggered mode Reliable guarantee thyristor.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram that the utility model is applied in the trigger impulse string drive circuit on the dynamic switching reactive-load compensation capacitor of thyristor device.
Fig. 2 is the concrete structure block diagram that is applied in the trigger impulse string drive circuit on the dynamic switching reactive-load compensation capacitor of thyristor device in Fig. 1.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
See also Fig. 1 and Fig. 2, be applied in the operation of the outside switching control signal driving thyristor module 1 that on the dynamic switching reactive-load compensation capacitor of thyristor device, the trigger impulse string drive circuit 2 on (thyristor module 1 as shown in Figure 1) sends by control device 3.
Trigger impulse string drive circuit 2 comprises input switching signal deteching circuit 21, zero passage signal detection circuit 22, logic judging circuit 23, pulse train circuit for generating 24, pulse power amplifier circuit 25, pulse train buffer circuit 26.
These input switching signal deteching circuit 21 output switching signals are to this logic judging circuit 23, this zero passage signal detection circuit 22 output zero passages output signal to this logic judging circuit 23, and this logic judging circuit 23 receive these two signals after output pulse string circuit for generating triggering signal to this pulse train circuit for generating 24.Input switching signal deteching circuit 21 adopts photoelectricity isolation with post-stage drive circuit, makes post-stage drive circuit noiseless to idle compensating control; Zero passage signal detection circuit 22 adopts advanced photoelectricity zero passage technology, and fast and reliable, bears withstand voltage height, stable output signal; The validity of logic judging circuit 23 judgement input switching signals and zero cross signal, make the two interlocking, with, only have the two is true time simultaneously, just triggers rear class pulse train circuit for generating 24.
This pulse train circuit for generating 24 is exported high-frequency impulse string signal to this pulse power amplifier circuit 25 according to this pulse train circuit for generating triggering signal, pulse train circuit for generating 24 utilizes the monostable working method of NE555 chip, triggers the successive pulse groups of its output certain frequency and duty ratio by logic judging circuit 23.
This pulse power amplifier circuit 25 carries out this high-frequency impulse string signal power amplification and exports high-power high-frequency burst signal to this pulse train buffer circuit 26, pulse power amplifier circuit 25 carries out power amplification by pulse train (i.e. this high-frequency impulse string signal), to strengthen the driving force to thyristor 1.
The reliable trigger impulse string signal of this pulse train buffer circuit 26 output thyristor is to drive thyristor module 1.Pulse train buffer circuit 26 is converted into by the pulse train weak electric signal of front stage drive circuit (i.e. the high-power high-frequency burst signal of this pulse power amplifier circuit 25) the forceful electric power signal that rear class drives thyristor 1 by pulse transformer, realizes strong and weak electricity isolation.
Referring again to accompanying drawing 2, input switching signal deteching circuit 21 judges whether the dynamic switching reactive-load compensation capacitor of thyristor device needs to carry out switching action, and it isolates control appliance and drive circuit by photoelectric device, does not interfere with each other on electric; Zero passage signal detection circuit 22 utilizes advanced photoelectric detecting technology, the time point signal of fast detecting output device switching.23 pairs of input switching signal deteching circuits 21 of logic judging circuit carry out and judgement with the signal of zero passage signal detection circuit 22 outputs, and when two output signals are all effective, logic judging circuit 23 is by the triggering signal of output pulse string circuit for generating.Receive after triggering signal, the NE555 monostable pulse train circuit for generating generated frequency of pulse train circuit for generating 24 and the fixing periodic pulse train of duty ratio, pulse train is through pulse power amplifier circuit 25, the voltage magnitude of pulse train is raise, driving force is strengthened, in order to the pulse transformer of driving pulse string buffer circuit 26.Pulse train buffer circuit 26 utilizes pulse transformer that pulse train is carried out to signal isolation, power match, and the burst transmission after conditioning, to the gate pole trigger terminal of thyristor module 1, guarantees reliably triggering and conducting of thyristor module 1 the most at last.
Trigger impulse string drive circuit 2 of the present utility model utilizes pulse transformer to make thyristor end strong power part and the isolation of drive circuit weak current part, avoid causing that because forceful electric power disturbs drive circuit damages, thereby cause thyristor to damage, adopt high-frequency pulse string triggering mode simultaneously, by the reliable conducting of effective forced-triggered thyristor, the job stability while guaranteeing the dynamic switching reactive-load compensation capacitor of thyristor device switching.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model a kind of novel strong trigger impulse string drive circuit being applied on the dynamic switching reactive-load compensation capacitor of thyristor device of the present utility model.Like this, if of the present utility model these are revised and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model patent is also intended to comprise these changes and modification interior.
Claims (3)
1. a trigger impulse string drive circuit, it is applied on the dynamic switching reactive-load compensation capacitor of thyristor device, it is characterized in that: this trigger impulse string drive circuit comprises input switching signal deteching circuit, zero passage signal detection circuit, logic judging circuit, pulse train circuit for generating, pulse power amplifier circuit, pulse train buffer circuit, this input switching signal deteching circuit output switching signal is to this logic judging circuit, this zero passage signal detection circuit output zero passage outputs signal to this logic judging circuit, and this logic judging circuit receive these two signals after output pulse string circuit for generating triggering signal to this pulse train circuit for generating, this pulse train circuit for generating is exported high-frequency impulse string signal thus to this pulse power amplifier circuit, this pulse power amplifier circuit carries out this high-frequency impulse string signal power amplification and exports high-power high-frequency burst signal to this pulse train buffer circuit, the reliable trigger impulse string signal of this pulse train buffer circuit output thyristor is to drive thyristor module.
2. trigger impulse string drive circuit as claimed in claim 1, is characterized in that: this pulse train circuit for generating utilizes the monostable working method of NE555 chip, triggers the continuous high-frequency pulse string of its output certain frequency and duty ratio by this logic judging circuit.
3. trigger impulse string drive circuit as claimed in claim 1, is characterized in that: this pulse train buffer circuit is converted into the high-power high-frequency burst signal of this pulse power amplifier circuit by pulse transformer the forceful electric power signal that drives thyristor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320651147.8U CN203522203U (en) | 2013-10-22 | 2013-10-22 | Trigger pulse string driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320651147.8U CN203522203U (en) | 2013-10-22 | 2013-10-22 | Trigger pulse string driving circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203522203U true CN203522203U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320651147.8U Expired - Lifetime CN203522203U (en) | 2013-10-22 | 2013-10-22 | Trigger pulse string driving circuit |
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| CN (1) | CN203522203U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680457A (en) * | 2016-04-18 | 2016-06-15 | 山东德佑电气股份有限公司 | Novel thyristor switch switching circuit |
| CN106788129A (en) * | 2016-12-13 | 2017-05-31 | 许昌学院 | A kind of power power electronic device with negative temperature compensation drives protection device |
-
2013
- 2013-10-22 CN CN201320651147.8U patent/CN203522203U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680457A (en) * | 2016-04-18 | 2016-06-15 | 山东德佑电气股份有限公司 | Novel thyristor switch switching circuit |
| CN105680457B (en) * | 2016-04-18 | 2018-05-15 | 山东德佑电气股份有限公司 | New thyristor switch switching circuit |
| CN106788129A (en) * | 2016-12-13 | 2017-05-31 | 许昌学院 | A kind of power power electronic device with negative temperature compensation drives protection device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ANHUI ONESKY POWDER QUALITY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ANHUI TIPWORLD ELECTRIC TECH. CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 230001 No. 97-1 Yonghe Road, hi tech Development Zone, Anhui, Hefei Patentee after: ANHUI ONESKY POWER QUALITY TECH. Co.,Ltd. Address before: 230001 No. 99 Yonghe Road, hi tech Zone, Anhui, Hefei Patentee before: ANHUI TIPWORLD ELECTRICAL TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
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| CX01 | Expiry of patent term |